[PATCH v3 20/33] target/arm: Convert SHADD, UHADD to gvec

[Richard Henderson]

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper.h             |   6 --
 target/arm/tcg/translate.h      |   5 ++
 target/arm/tcg/gengvec.c        | 144 ++++++++++++++++++++++++++++++++
 target/arm/tcg/neon_helper.c    |  27 ------
 target/arm/tcg/translate-a64.c  |  17 ++--
 target/arm/tcg/translate-neon.c |   4 +-
 6 files changed, 158 insertions(+), 45 deletions(-)

diff --git a/target/arm/helper.h b/target/arm/helper.h
index 9a89c9cea7..b26bfcb079 100644
--- a/target/arm/helper.h
+++ b/target/arm/helper.h
@@ -268,12 +268,6 @@ DEF_HELPER_FLAGS_2(fjcvtzs, TCG_CALL_NO_RWG, i64, f64, ptr)
 DEF_HELPER_FLAGS_3(check_hcr_el2_trap, TCG_CALL_NO_WG, void, env, i32, i32)
 
 /* neon_helper.c */
-DEF_HELPER_2(neon_hadd_s8, i32, i32, i32)
-DEF_HELPER_2(neon_hadd_u8, i32, i32, i32)
-DEF_HELPER_2(neon_hadd_s16, i32, i32, i32)
-DEF_HELPER_2(neon_hadd_u16, i32, i32, i32)
-DEF_HELPER_2(neon_hadd_s32, s32, s32, s32)
-DEF_HELPER_2(neon_hadd_u32, i32, i32, i32)
 DEF_HELPER_2(neon_rhadd_s8, i32, i32, i32)
 DEF_HELPER_2(neon_rhadd_u8, i32, i32, i32)
 DEF_HELPER_2(neon_rhadd_s16, i32, i32, i32)
diff --git a/target/arm/tcg/translate.h b/target/arm/tcg/translate.h
index 048cb45ebe..dd99d76bf2 100644
--- a/target/arm/tcg/translate.h
+++ b/target/arm/tcg/translate.h
@@ -472,6 +472,11 @@ void gen_neon_sqrshl(unsigned vece, uint32_t rd_ofs, 
uint32_t rn_ofs,
 void gen_neon_uqrshl(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
                      uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
 
+void gen_gvec_shadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
+                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
+void gen_gvec_uhadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
+                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz);
+
 void gen_cmtst_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b);
 void gen_ushl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
 void gen_sshl_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b);
diff --git a/target/arm/tcg/gengvec.c b/target/arm/tcg/gengvec.c
index 2451d23823..c0627a787b 100644
--- a/target/arm/tcg/gengvec.c
+++ b/target/arm/tcg/gengvec.c
@@ -1861,3 +1861,147 @@ void gen_gvec_uminp(unsigned vece, uint32_t rd_ofs, 
uint32_t rn_ofs,
     tcg_debug_assert(vece <= MO_32);
     tcg_gen_gvec_3_ool(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, 0, fns[vece]);
 }
+
+static void gen_shadd8_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b)
+{
+    TCGv_i64 t = tcg_temp_new_i64();
+
+    tcg_gen_and_i64(t, a, b);
+    tcg_gen_vec_sar8i_i64(a, a, 1);
+    tcg_gen_vec_sar8i_i64(b, b, 1);
+    tcg_gen_andi_i64(t, t, dup_const(MO_8, 1));
+    tcg_gen_vec_add8_i64(d, a, b);
+    tcg_gen_vec_add8_i64(d, d, t);
+}
+
+static void gen_shadd16_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b)
+{
+    TCGv_i64 t = tcg_temp_new_i64();
+
+    tcg_gen_and_i64(t, a, b);
+    tcg_gen_vec_sar16i_i64(a, a, 1);
+    tcg_gen_vec_sar16i_i64(b, b, 1);
+    tcg_gen_andi_i64(t, t, dup_const(MO_16, 1));
+    tcg_gen_vec_add16_i64(d, a, b);
+    tcg_gen_vec_add16_i64(d, d, t);
+}
+
+static void gen_shadd_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
+{
+    TCGv_i32 t = tcg_temp_new_i32();
+
+    tcg_gen_and_i32(t, a, b);
+    tcg_gen_sari_i32(a, a, 1);
+    tcg_gen_sari_i32(b, b, 1);
+    tcg_gen_andi_i32(t, t, 1);
+    tcg_gen_add_i32(d, a, b);
+    tcg_gen_add_i32(d, d, t);
+}
+
+static void gen_shadd_vec(unsigned vece, TCGv_vec d, TCGv_vec a, TCGv_vec b)
+{
+    TCGv_vec t = tcg_temp_new_vec_matching(d);
+
+    tcg_gen_and_vec(vece, t, a, b);
+    tcg_gen_sari_vec(vece, a, a, 1);
+    tcg_gen_sari_vec(vece, b, b, 1);
+    tcg_gen_and_vec(vece, t, t, tcg_constant_vec_matching(d, vece, 1));
+    tcg_gen_add_vec(vece, d, a, b);
+    tcg_gen_add_vec(vece, d, d, t);
+}
+
+void gen_gvec_shadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
+                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz)
+{
+    static const TCGOpcode vecop_list[] = {
+        INDEX_op_sari_vec, INDEX_op_add_vec, 0
+    };
+    static const GVecGen3 g[] = {
+        { .fni8 = gen_shadd8_i64,
+          .fniv = gen_shadd_vec,
+          .opt_opc = vecop_list,
+          .vece = MO_8 },
+        { .fni8 = gen_shadd16_i64,
+          .fniv = gen_shadd_vec,
+          .opt_opc = vecop_list,
+          .vece = MO_16 },
+        { .fni4 = gen_shadd_i32,
+          .fniv = gen_shadd_vec,
+          .opt_opc = vecop_list,
+          .vece = MO_32 },
+    };
+    tcg_debug_assert(vece <= MO_32);
+    tcg_gen_gvec_3(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, &g[vece]);
+}
+
+static void gen_uhadd8_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b)
+{
+    TCGv_i64 t = tcg_temp_new_i64();
+
+    tcg_gen_and_i64(t, a, b);
+    tcg_gen_vec_shr8i_i64(a, a, 1);
+    tcg_gen_vec_shr8i_i64(b, b, 1);
+    tcg_gen_andi_i64(t, t, dup_const(MO_8, 1));
+    tcg_gen_vec_add8_i64(d, a, b);
+    tcg_gen_vec_add8_i64(d, d, t);
+}
+
+static void gen_uhadd16_i64(TCGv_i64 d, TCGv_i64 a, TCGv_i64 b)
+{
+    TCGv_i64 t = tcg_temp_new_i64();
+
+    tcg_gen_and_i64(t, a, b);
+    tcg_gen_vec_shr16i_i64(a, a, 1);
+    tcg_gen_vec_shr16i_i64(b, b, 1);
+    tcg_gen_andi_i64(t, t, dup_const(MO_16, 1));
+    tcg_gen_vec_add16_i64(d, a, b);
+    tcg_gen_vec_add16_i64(d, d, t);
+}
+
+static void gen_uhadd_i32(TCGv_i32 d, TCGv_i32 a, TCGv_i32 b)
+{
+    TCGv_i32 t = tcg_temp_new_i32();
+
+    tcg_gen_and_i32(t, a, b);
+    tcg_gen_shri_i32(a, a, 1);
+    tcg_gen_shri_i32(b, b, 1);
+    tcg_gen_andi_i32(t, t, 1);
+    tcg_gen_add_i32(d, a, b);
+    tcg_gen_add_i32(d, d, t);
+}
+
+static void gen_uhadd_vec(unsigned vece, TCGv_vec d, TCGv_vec a, TCGv_vec b)
+{
+    TCGv_vec t = tcg_temp_new_vec_matching(d);
+
+    tcg_gen_and_vec(vece, t, a, b);
+    tcg_gen_shri_vec(vece, a, a, 1);
+    tcg_gen_shri_vec(vece, b, b, 1);
+    tcg_gen_and_vec(vece, t, t, tcg_constant_vec_matching(d, vece, 1));
+    tcg_gen_add_vec(vece, d, a, b);
+    tcg_gen_add_vec(vece, d, d, t);
+}
+
+void gen_gvec_uhadd(unsigned vece, uint32_t rd_ofs, uint32_t rn_ofs,
+                    uint32_t rm_ofs, uint32_t opr_sz, uint32_t max_sz)
+{
+    static const TCGOpcode vecop_list[] = {
+        INDEX_op_shri_vec, INDEX_op_add_vec, 0
+    };
+    static const GVecGen3 g[] = {
+        { .fni8 = gen_uhadd8_i64,
+          .fniv = gen_uhadd_vec,
+          .opt_opc = vecop_list,
+          .vece = MO_8 },
+        { .fni8 = gen_uhadd16_i64,
+          .fniv = gen_uhadd_vec,
+          .opt_opc = vecop_list,
+          .vece = MO_16 },
+        { .fni4 = gen_uhadd_i32,
+          .fniv = gen_uhadd_vec,
+          .opt_opc = vecop_list,
+          .vece = MO_32 },
+    };
+    tcg_debug_assert(vece <= MO_32);
+    tcg_gen_gvec_3(rd_ofs, rn_ofs, rm_ofs, opr_sz, max_sz, &g[vece]);
+}
diff --git a/target/arm/tcg/neon_helper.c b/target/arm/tcg/neon_helper.c
index b29a7c725f..defd28a6f7 100644
--- a/target/arm/tcg/neon_helper.c
+++ b/target/arm/tcg/neon_helper.c
@@ -179,33 +179,6 @@ uint32_t HELPER(glue(neon_,name))(uint32_t arg) \
     return arg; \
 }
 
-#define NEON_FN(dest, src1, src2) dest = (src1 + src2) >> 1
-NEON_VOP(hadd_s8, neon_s8, 4)
-NEON_VOP(hadd_u8, neon_u8, 4)
-NEON_VOP(hadd_s16, neon_s16, 2)
-NEON_VOP(hadd_u16, neon_u16, 2)
-#undef NEON_FN
-
-int32_t HELPER(neon_hadd_s32)(int32_t src1, int32_t src2)
-{
-    int32_t dest;
-
-    dest = (src1 >> 1) + (src2 >> 1);
-    if (src1 & src2 & 1)
-        dest++;
-    return dest;
-}
-
-uint32_t HELPER(neon_hadd_u32)(uint32_t src1, uint32_t src2)
-{
-    uint32_t dest;
-
-    dest = (src1 >> 1) + (src2 >> 1);
-    if (src1 & src2 & 1)
-        dest++;
-    return dest;
-}
-
 #define NEON_FN(dest, src1, src2) dest = (src1 + src2 + 1) >> 1
 NEON_VOP(rhadd_s8, neon_s8, 4)
 NEON_VOP(rhadd_u8, neon_u8, 4)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 3c6cfc2952..5f3423513d 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -10965,6 +10965,13 @@ static void disas_simd_3same_int(DisasContext *s, 
uint32_t insn)
     }
 
     switch (opcode) {
+    case 0x00: /* SHADD, UHADD */
+        if (u) {
+            gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_uhadd, size);
+        } else {
+            gen_gvec_fn3(s, is_q, rd, rn, rm, gen_gvec_shadd, size);
+        }
+        return;
     case 0x0c: /* SMAX, UMAX */
         if (u) {
             gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_umax, size);
@@ -11032,16 +11039,6 @@ static void disas_simd_3same_int(DisasContext *s, 
uint32_t insn)
             read_vec_element_i32(s, tcg_op2, rm, pass, MO_32);
 
             switch (opcode) {
-            case 0x0: /* SHADD, UHADD */
-            {
-                static NeonGenTwoOpFn * const fns[3][2] = {
-                    { gen_helper_neon_hadd_s8, gen_helper_neon_hadd_u8 },
-                    { gen_helper_neon_hadd_s16, gen_helper_neon_hadd_u16 },
-                    { gen_helper_neon_hadd_s32, gen_helper_neon_hadd_u32 },
-                };
-                genfn = fns[size][u];
-                break;
-            }
             case 0x2: /* SRHADD, URHADD */
             {
                 static NeonGenTwoOpFn * const fns[3][2] = {
diff --git a/target/arm/tcg/translate-neon.c b/target/arm/tcg/translate-neon.c
index 5f1576393e..29e5c4a0a3 100644
--- a/target/arm/tcg/translate-neon.c
+++ b/target/arm/tcg/translate-neon.c
@@ -841,6 +841,8 @@ DO_3SAME_NO_SZ_3(VPMAX_S, gen_gvec_smaxp)
 DO_3SAME_NO_SZ_3(VPMIN_S, gen_gvec_sminp)
 DO_3SAME_NO_SZ_3(VPMAX_U, gen_gvec_umaxp)
 DO_3SAME_NO_SZ_3(VPMIN_U, gen_gvec_uminp)
+DO_3SAME_NO_SZ_3(VHADD_S, gen_gvec_shadd)
+DO_3SAME_NO_SZ_3(VHADD_U, gen_gvec_uhadd)
 
 #define DO_3SAME_CMP(INSN, COND)                                        \
     static void gen_##INSN##_3s(unsigned vece, uint32_t rd_ofs,         \
@@ -951,8 +953,6 @@ DO_SHA2(SHA256SU1, gen_helper_crypto_sha256su1)
         FUNC(d, tcg_env, n, m);                                         \
     }
 
-DO_3SAME_32(VHADD_S, hadd_s)
-DO_3SAME_32(VHADD_U, hadd_u)
 DO_3SAME_32(VHSUB_S, hsub_s)
 DO_3SAME_32(VHSUB_U, hsub_u)
 DO_3SAME_32(VRHADD_S, rhadd_s)
-- 
2.34.1